Resolution

Unistall application PEM from service node (using standard way through Control panel -> Uninstall applications)

Remove 'C:\POA_Deploy' and 'C:\Program Files(x86)\SwSoft' folders from service node

Add service node again(without pre-installed MSSQL* and if you need to have Express Edition) or add server like external database server (with previously installed MS SQL Standard or any other required edition).